| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 53 |
| 3 | 761 |
| 4 | 12661 |
| 5 | 229705 |
| 6 | 4410665 |
| 7 | 88127485 |
| 8 | 1813270645 |
| 9 | 38158684745 |
| 10 | 817458330553 |
| 11 | 17767242718285 |
| 12 | 390819348043369 |
| 13 | 8683822363169933 |
| 14 | 194618212789162733 |
| 15 | 4394243766346694161 |
| 16 | 99862206804817230965 |
| 17 | 2282427331053360624713 |
[1,5,53,761,12661,229705,4410665,88127485, 1813270645,38158684745,817458330553, 17767242718285,390819348043369,8683822363169933, 194618212789162733,4394243766346694161, 99862206804817230965,2282427331053360624713] |